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Tigran Vartanovich Petrosian vs Laszlo Szabo
Zurich Candidates (1953), Zurich SUI, rd 24, Oct-13
English Opening: Symmetrical. Three Knights Variation (A34)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Jan-10-05  fizixgeek: Sometimes I go through a masters' game and don't know what' going on. This is an example.

7 ... Nd7? Black has blocked in his queen bishop. Why not Bd7? Is he really so worried about his QB pawn? I guess now that he's set up his K-side fianchetto he doesn't want to rely on his king bishop to protect his QB pawn.

8 ... h6 was a question at first. Now I see that after 9. h5, this move allows 9... g5.

11. c4? e5? What's going on here? White increases the scope of Black's K bishop and invites Nb6. Black immediately blocks his own bishop and puts a big hole at d5.

I suppose with 29. ...Nxc4, Black gets three pawns for his knight, but to do so he has to allow the exchange of the rooks which at that point seems nice for White.

36. Kd2? What's White afraid of?

Then, after move 41, Black resigns!? I realize he's down a knight, but Black has the only passed pawn on the board and it seems like 41. ... Bh6 ties the White pieces up fairly well. After 42. Kd3 Qd7+ 43. Kc2 Qa4+, White almost seems in danger of drawing by perpetual check or giving up either his c-pawn or his bishop. After 42. Kf3 Qf5+ 43. Kg2 Qg4+ 44. Kf1 Qh3+ 45. Ke2 Qe6, we're right back where we started. How does White win here?

Jan-10-05  jdb22601: fizix on 7...bd7 i think this allows 8.qe4 threatening 9.qxb7 and 9.qe5 hitting h8 and c5 pawn. althought this is pawn hunting i think white gets by with it . at end i think white should reply to bh6 with qf3 and kf2 instead of ur suggested king moves
Jan-10-05  euripides: <fizix> Interesting questions.

If 7...Bd7 White can play 8 Qb3. This hits both b7 and f7. E.g. 8...Bc6 9 Ne5. If 8...Qc2 White might continue 9 Bg2 or d3 developing and with some threats against the Q-side or the idea of Ng5-e4.

11..e5 supports Black's plan of developing a K-side attack with f5-f4. c4 allows d3 to follow and prevents a future ...c4. Since most of Black's play is on the king's side, White need not be too worried about the long black diagonal.

At the end, I am somewhat surprised Szabo resigned even after adjournment analysis. The best I see for White is 41...Bh6 42 Qf3 Bxe3 43 Qxe3 Qg4+ 44 Kd3 Qxh4 45 Qxc5. Now White will win if he can keep the queens on and restrain the king-side pawns. Winning after the Q exchange may also be possible if white enters that endgame under the right circumstances, but he would need to be very careful

But I'm not absolutely sure about any of these.

Jan-10-05  euripides: About 36 Ke2 I'm not sure but I think if 36 Bxc5 then 36...Qh1+ and e.g. 37 Kd2 Qe4 38 Ne3 Bf6. Petrosian prefers at this stage to keep both his pawns.
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